Hi all,
I have looked at the orbit 0606 ATS file, IBEX_2023_117_o0606a_v001.scr and I approve.
The constraint violations in IBEX_2023_117_o0606a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2023_117_o0606a_v001.scr match those in the STF, IBEX_2023_117_o0606a_v002.stf.
Ascending and descending command sequences are consistent with each other, 15 Re ascending, the apogee maneuver time and 15 Re descending as determined from the OEF, IBEX_2023_117_o0606a_v001.oef and as verified
with ibex_orbit.
There is 1 star tracker outage this orbit. It lasts ~33 hours and ends ~36 mins before the perigee maneuver.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit606_Contacts.txt for all contacts (3).
Battery Balancing is 90 minutes long, more than 2 hours away from payload descending macros, 13.509 hrs, and more than 15 minutes away from a maneuver, 88 mins.
The Inertial maneuver at perigee of orbit 0605 left us pointing in safe directions for the orbit 0606 arc A ascending and descending sequences:
ibex_rotate -o -u 0.82095,0.527405,0.218825 -w ibex-sun -t 2023/04:28:08:51:59
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.820950,+0.527405,+0.218825
which is R.A. +32.718 Decl. +12.640
missing R.A. +35.128 Decl. +13.985 (ibex-sun)
error is R.A. +2.410 Decl. +1.345
for a total 2.703 deg
ibex_rotate -o -u 0.82095,0.527405,0.218825 -w ibex-sun -t 2023/05:02:01:24:04
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.820950,+0.527405,+0.218825
which is R.A. +32.718 Decl. +12.640
missing R.A. +38.697 Decl. +15.172 (ibex-sun)
error is R.A. +5.979 Decl. +2.532
for a total 6.331 deg
The Inertial precession maneuver at apogee leaves us pointing in safe directions at the time of the maneuver and for arc B ascending and descending sequences:
ibex_rotate -o -u 0.774682,0.584062,0.242362 -w ibex-sun -t 2023/05:02:03:07:12
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.774682,+0.584062,+0.242362
which is R.A. +37.014 Decl. +14.026
missing R.A. +38.766 Decl. +15.195 (ibex-sun)
error is R.A. +1.752 Decl. +1.169
for a total 2.059 deg
ibex_rotate -o -u 0.774682,0.584062,0.242362 -w ibex-sun -t 2023/05:02:04:42:18
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.774682,+0.584062,+0.242362
which is R.A. +37.014 Decl. +14.026
missing R.A. +38.831 Decl. +15.216 (ibex-sun)
error is R.A. +1.817 Decl. +1.190
for a total 2.123 deg
ibex_rotate -o -u 0.774682,0.584062,0.242362 -w ibex-sun -t 2023/05:06:15:59:29
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.774682,+0.584062,+0.242362
which is R.A. +37.014 Decl. +14.026
missing R.A. +43.110 Decl. +16.518 (ibex-sun)
error is R.A. +6.096 Decl. +2.492
for a total 6.386 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0607 apogee:
ibex_rotate -o -u 0.722412,0.637946,0.266734 -w ibex-sun -t 2023/05:07:04:02:03
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.722412,+0.637946,+0.266734
which is R.A. +41.447 Decl. +15.470
missing R.A. +43.566 Decl. +16.627 (ibex-sun)
error is R.A. +2.119 Decl. +1.157
for a total 2.342 deg
ibex_rotate -o -u 0.722412,0.637946,0.266734 -w ibex-sun -t 2023-05-11T17:26:21
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.722412,+0.637946,+0.266734
which is R.A. +41.447 Decl. +15.470
missing R.A. +48.037 Decl. +17.880 (ibex-sun)
error is R.A. +6.590 Decl. +2.410
for a total 6.756 deg
There is no overlap with orbit 0605 commands.
Command Approval Checklist is attached.
Carol
--
Carol Weaver
University of New Hampshire
503-902-8492
From:
Perry, Timothy E [US] (SP) <Timothy.Perry@ngc.com>
Date: Friday, April 14, 2023 at 13:06
To: Carol Weaver <carol.weaver@unh.edu>, Chubin, Eric [US] (SP) <Eric.Chubin@ngc.com>, David Heirtzler <David.Heirtzler@unh.edu>, IBEX FDG Group <ADS-IBEX@l3harris.com>, IBEXOPS <IBEXOPS@gmail.com>, ISOC <isocops@lists.sr.unh.edu>, Ken Fairchild <fair-play@comcast.net>,
Ken Fairchild (kwfairchild@gmail.com) <kwfairchild@gmail.com>, Kenneth Fairchild <Ken.Fairchild@unh.edu>, angoldconsulting <angoldconsulting@earthlink.net>, Paul Janzen <Paul.Janzen@mso.umt.edu>, Perry, Timothy E [US] (SP) <Timothy.Perry@ngc.com>, Tyler, Ryan
S [US] (SP) <Ryan.Tyler@ngc.com>, Wesley, Sheral R [US] (SP) <Sheral.Wesley@ngc.com>, Wynn, Reese [US] (SP) <Reese.Wynn@ngc.com>
Subject: IBEX Orbit #606 ATS Approval (28 Apr – 07 May 2023)
CAUTION: This email originated from outside of the University System. Do not click links or open attachments unless you recognize
the sender and know the content is safe.
All,
Attached are the planning files for Orbit #606 Please respond to this thread with comments and approvals.
Approvals are required by COB, 17 Apr 2023
Please note the following:
1.
Battery Balancing this orbit
Begin
2023/05/07 05:30:00– End 2023/05/07 07:00:00
Please note that the battery balancing is not being performed at perigee. The perigee inertial maneuver was moved to around
perigee due to a star tracker outage. The battery balancing will now take place at 12re ascending. This is a quiet period in the orbit, post maneuver.
2.
Command Load Constraint Violation Report (CCVR)
IBEX_2023_117_o0606a_v001.ccvr
# Input files:
1
#
IBEX_2023_117_o0606a_v001.scr
==========================
HARD CONSTRAINT VIOLATIONS
==========================
NO VIOLATIONS.
==========================
SOFT CONSTRAINT VIOLATIONS
==========================
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2023/04/28 06:45:40 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2023/05/02 04:12:18 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES